Thermal management system for electric vehicles

Abstract

A thermal management system includes: a first radiator, a first electric water pump, and a first coolant line configured to allow a coolant to be circulated by the first electric water pump; a second radiator, a second electric water pump, and a second coolant line configured to allow a coolant to be circulated by the second electric water pump; and a first flow control device and a second flow control device installed at front ends and rear ends of the first radiator and the second radiator so as to control a coolant flow direction between the first coolant line, the second coolant line, and a third coolant line. The third coolant line is installed so as to connect the first flow control device and the second flow control device to each other.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims, under 35 U.S.C. § 119(a), the benefit of priority to Korean Patent Application No. 10-2021-0025221 filed on Feb. 25, 2021, the entire contents of which are incorporated herein by reference.BACKGROUND(a) Technical Field[0002]The present disclosure relates to a thermal management system for electric vehicles, and more particularly to a thermal management system for electric vehicles capable of greatly increasing the flow rate of a coolant in each coolant line and the flow rate of the coolant passing through each radiator and improving cooling performance under various vehicle conditions through coolant flow control.(b) Background Art[0003]In general, a vehicle is equipped with a heating, ventilation, and air conditioning (HVAC) system configured to heat or cool the interior of the vehicle. The air conditioning apparatus constantly maintains temperature in the interior of the vehicle at the optimum temperature, irresp...

AI Technical Summary

Benefits of technology

This patent is for a system that manages the temperature of electric vehicles. It improves cooling by increasing the flow of coolant in each line and through each radiator. This allows for better cooling performance in various conditions.

Problems solved by technology

Unless heat from the battery as well as a driving motor is appropriately removed, the parts cannot exhibit the optimum performance.

Furthermore, an interior cooling and heating problem must be solved even in the electric vehicle, and air conditioning performance at the time of interior cooling and heating greatly affects energy efficiency of the vehicle.

Consequently, it is difficult to in increase flow rate of the coolant, when the flow rate of the coolant that passes through the radiator is reduced, and therefore cooling performance is deteriorated.

Particularly, in a high-performance electric vehicle, it is difficult to increase flow rate of the coolant to handle an increase in the amount of heat radiation, whereby sufficient cooling performance is not satisfied.

In addition, the flow rate of the coolant that passes through the water cooling type heat exchanger (water cooling type condenser) is also low, whereby sufficient condensation is not achieved.

As a result, power consumption of the air conditioning system increases, and cooling performance thereof deteriorates.

Images